<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>请客吃饭</title>
</head>

<body>
    <script>
        var money = prompt('钱包中的金额是');
        if (money >= 2000) {
            alert('请大家吃西餐');
        } else if (money >= 1500) {
            alert('请大家吃快餐');
        } else if (money >= 1000) {
            alert('请大家喝饮料');
        } else if (money >= 500) {
            alert('请大家吃棒棒糖');
        } else {
            alert('下次把钱带够');
        }
    </script>
</body>

</html>